We use the lessons from past experiences to make better choices the next time around. People with ADHD have a hard time stopping long enough to remember those lessons and apply them forward, so they’re more likely to make the same mistakes.
Once someone with ADHD gets going on something, there’s the second challenge of sticking with it all the way through. Unfortunately, most of our daily obligations don’t give partial credit for tasks that are mostly done.
Everybody has to use a certain amount of force of will to get going on boring tasks, but people with ADHD have a much steeper hill to climb. As a result, they tend to procrastinate until the pressure of a looming deadline pushes them into action.
People with ADHD tend to express their feelings more strongly than others do and are more influenced by their feelings than other people are. This also affects their ability to see beyond their emotions and to take others’ perspectives into account.